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| Autores principales: | , , , , , , , , , |
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
| Publicado: |
PANGAEA
2017
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| Materias: | |
| Acceso en línea: | https://doi.org/10.1594/PANGAEA.873755 |
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| _version_ | 1867170471295844352 |
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| author | Kuhn, Gerhard Hillenbrand, Claus-Dieter Kasten, Sabine Smith, James A Nitsche, Frank-Oliver Frederichs, Thomas Wiers, Steffen Ehrmann, Werner Klages, Johann Philipp Mogollón, José M |
| author_facet | Kuhn, Gerhard Hillenbrand, Claus-Dieter Kasten, Sabine Smith, James A Nitsche, Frank-Oliver Frederichs, Thomas Wiers, Steffen Ehrmann, Werner Klages, Johann Philipp Mogollón, José M |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Subglacial lakes are widespread beneath the Antarctic ice sheet but their control on ice sheet dynamics and their ability to harbour life remain poorly characterised. Here we present the evidence for a palaeo-subglacial lake on the Antarctic continental shelf. A distinct sediment facies recovered from a bedrock basin in Pine Island Bay indicates deposition within a low-energy lake environment. Diffusive-advection modelling demonstrates that low chloride concentrations in the sediment pore water can only be explained by initial deposition of this facies in a freshwater setting. These observations indicate that an active subglacial meltwater network, similar to that observed beneath the extant ice sheet, was also active during the last glacial period. It also provides a new framework for refining exploration of these unique environments. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_873755 |
| institution | PANGAEA |
| language | en |
| publishDate | 2017 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Sediment facies of a paleo-subglacial lake on the Antarctic continentral shelf Kuhn, Gerhard Hillenbrand, Claus-Dieter Kasten, Sabine Smith, James A Nitsche, Frank-Oliver Frederichs, Thomas Wiers, Steffen Ehrmann, Werner Klages, Johann Philipp Mogollón, José M AWI_Paleo; Paleoenvironmental Reconstructions from Marine Sediments @ AWI Subglacial lakes are widespread beneath the Antarctic ice sheet but their control on ice sheet dynamics and their ability to harbour life remain poorly characterised. Here we present the evidence for a palaeo-subglacial lake on the Antarctic continental shelf. A distinct sediment facies recovered from a bedrock basin in Pine Island Bay indicates deposition within a low-energy lake environment. Diffusive-advection modelling demonstrates that low chloride concentrations in the sediment pore water can only be explained by initial deposition of this facies in a freshwater setting. These observations indicate that an active subglacial meltwater network, similar to that observed beneath the extant ice sheet, was also active during the last glacial period. It also provides a new framework for refining exploration of these unique environments. |
| title | Sediment facies of a paleo-subglacial lake on the Antarctic continentral shelf |
| topic | AWI_Paleo; Paleoenvironmental Reconstructions from Marine Sediments @ AWI |
| url | https://doi.org/10.1594/PANGAEA.873755 |